Rio Premier Fathom Fly Line

The hang marker is a distinct color change located near the end of the line. It tells you exactly when your fly is approaching the surface during the retrieve, allowing you to pause and fish the 'hang' effectively without needing to look down at your reel.

Your choice depends on the depth of the water and how deep the fish are holding. A Type-3 line sinks at 3 inches per second, making it ideal for shallower water or slow retrieves, while Type-6 or Type-7 lines are better for getting down quickly to deep-holding trout in stillwater.

Most models feature density compensation to ensure the line sinks at a consistent, straight rate, which helps maintain better contact with your fly. Note that the Type-7 model is the exception and does not include this specific feature.

This contrast serves as a visual loading point indicator. It helps you quickly identify exactly how much line to strip out before casting, allowing you to load the rod efficiently and minimize the number of false casts needed to reach your target.

The Fathom is engineered with a short, quick-loading head specifically designed to maximize distance with fewer casts. While it excels in open stillwater, this design also makes it quite effective for making quick, accurate shots in tighter conditions where backcast room might be limited.